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Vishay General Semiconductor - Diodes Division SMPC70ANHM3/I
- Part No.:
- SMPC70ANHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC70ANHM3/I.pdf
- Description:
- TVS DIODE 70VWM 113VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:4,987
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Product details
Overview
SMPC70ANHM3/I from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor in the SMPC (TO-277A) package, rated for 70 V standoff voltage (VWM), 77.8–86.0 V breakdown (VBR), 1500 W peak pulse power (PPPM), and 13.3 A peak pulse current (IPPM). It protects MOSFETs, sensor signal lines, and automotive ECUs against inductive switching transients and lightning-induced surges.
For engineers reviewing the SMPC70ANHM3/I datasheet, SMPC70ANHM3/I pinout, SMPC70ANHM3/I application, or SMPC70ANHM3/I equivalent, this AEC-Q101 qualified TVS diode delivers low-profile clamping (113 V max VC at IPPM), MSL Level 1 reflow compatibility (260 °C peak), and halogen-free RoHS compliance - critical for automotive body control modules, industrial PLC I/O protection, and high-reliability embedded sensor interfaces.
Technical Context
This device operates as a unidirectional avalanche diode with a cathode-band-marked polarity, requiring correct orientation to clamp positive transients on anode-to-cathode paths. Its 1.1 mm typical height and TO-277A footprint enable dense PCB layouts while maintaining thermal resistance of RθJA ≤ 100 °C/W on FR4 with 2 oz copper.
The SMPC70ANHM3/I exhibits fast response time (< 1 ns), low incremental surge resistance, and stable clamping under 10/1000 μs waveform stress. It is specifically qualified per AEC-Q101 for automotive applications, distinguishing it from industrial-grade M3-suffix variants - no derating required up to TJ = 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 77.8 V / 86.0 V at 1 mA - guaranteed avalanche onset range for reliable turn-on margin |
| VC @ IPPM | 113 V - clamped voltage during 13.3 A 10/1000 μs surge, defining worst-case overvoltage seen by protected IC |
| PPPM | 1500 W - peak transient power handling capability under standardized surge waveform |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMPC (TO-277A) - 3-terminal surface-mount outline with cathode band marking and 1.1 mm profile |
| AEC-Q101 | Qualified - certified for automotive use with validated reliability testing including HTGB, HTRB, and TCT |
Pinout & Package
SMPC70ANHM3/I uses the SMPC (TO-277A) package: a 3-terminal surface-mount case with 1.1 mm typical height, UL 94 V-0 molding compound, matte tin-plated leads, and cathode identification via molded band. Terminals are arranged with Cathode (K) centered and Anodes (A1, A2) on either side.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (center) | Clamping output node | Connected to protected circuit's reference rail (e.g., ground or supply); carries full surge current during clamping |
| Anode 1 (left) | Input terminal | Connected to line under protection (e.g., sensor VCC or CAN-H); forms unidirectional clamping path to cathode |
| Anode 2 (right) | Input terminal | Electrically tied to Anode 1 internally; enables dual-side PCB routing and enhanced thermal spreading |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping | Protects only positive-going transients on DC-biased lines without affecting negative signal swing |
| AEC-Q101 qualification | Validated for automotive powertrain and chassis systems where field failure risk must be minimized |
| Low-profile SMPC package | 1.1 mm height enables placement beneath connectors or in tight engine-control module cavities |
| 1500 W PPPM rating | Withstands ISO 7637-2 Pulse 1/2a/5a surges without degradation when properly heatsinked |
| MSL Level 1 | Supports single-pass 260 °C lead-free reflow without popcorn cracking or delamination |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and door actuator drivers from load-dump and inductive kickback in vehicle body electronics. IC Role / Device Role / Timing Role: Unidirectional TVS placed between LIN line and ground to clamp transients above 70 V while preserving signal integrity below VWM. Use Value: Prevents latch-up or permanent damage to LIN transceivers during 12 V system load dump events (ISO 16750-2), extending ECU field life. |
Use Scenario: Safeguarding 4–20 mA current-loop analog outputs in programmable logic controllers from field wiring surges. IC Role / Device Role / Timing Role: Clamping device connected across output terminals to limit voltage excursion during cable ESD or lightning coupling. Use Value: Maintains loop accuracy by limiting clamping voltage to 113 V, preventing op-amp saturation and ensuring 4–20 mA compliance under surge conditions. |
| Automotive HVAC Blower Motor Driver | Telecom Power Input Stage |
Use Scenario: Shielding N-channel MOSFET half-bridge drivers from back-EMF spikes generated by brushed blower motors. IC Role / Device Role / Timing Role: Mounted directly at motor driver IC power input pins to absorb 1500 W inductive energy within nanoseconds. Use Value: Eliminates need for external snubbers by providing sub-1 ns response and 13.3 A surge current handling, reducing BOM count and board space. |
Use Scenario: Protecting AC/DC front-end rectifiers and PFC controllers in telecom power supplies from AC line surges (IEC 61000-4-5). IC Role / Device Role / Timing Role: Placed across bulk capacitor input to clamp differential-mode transients before they reach downstream converters. Use Value: Withstands 10/1000 μs surges up to 1500 W without degradation, meeting GR-1089-CORE Level 3 requirements for central office equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ70A-E3/5A | DO-214AC package; lower PPPM (400 W); VBR 77.8–86.0 V; not AEC-Q101 qualified | Suitable for industrial/commercial PCBs where automotive qualification is unnecessary | Select when cost sensitivity outweighs automotive reliability requirements and board space allows larger footprint |
| SMCJ70A-QH | SMC (DO-214AB) package; higher PPPM (1500 W); same VBR/VWM; AEC-Q101 qualified; 2.3 mm height | Better thermal dissipation but incompatible with ultra-low-profile layouts requiring ≤1.1 mm height | Choose when higher power derating margin is needed and mechanical clearance permits taller profile |
Compared with SMAJ70A-E3/5A, SMPC70ANHM3/I offers automotive qualification and tighter height; compared with SMCJ70A-QH, it provides identical surge rating in a 1.1 mm profile - making it optimal for space-constrained automotive modules where MSL-1 reflow and AEC-Q101 validation are mandatory.
Availability
SMPC70ANHM3/I is available at Aetrix Electronics and suitable for automotive body control units, industrial sensor interface boards, and telecom power input stages requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMPC70ANHM3/I includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMPC series targets high-reliability transient suppression in automotive and industrial environments, designed to replace older DO-15/DO-201 packages with superior surge density, lower profile, and AEC-Q101 compliance.
FAQ
What is the clamping voltage of SMPC70ANHM3/I at its rated peak pulse current?
The SMPC70ANHM3/I has a maximum clamping voltage (VC) of 113 V when subjected to its rated 13.3 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is measured with cathode mounted to heatsink per datasheet test conditions.
Is SMPC70ANHM3/I suitable for automotive applications?
Yes, SMPC70ANHM3/I is explicitly AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation revision 17-Sep-2021. It undergoes stress testing for high-temperature reverse bias, temperature cycling, and unbiased highly accelerated stress testing - making it appropriate for under-hood and chassis-mounted automotive electronics.
What does the "I" suffix in SMPC70ANHM3/I indicate?
The "I" suffix in SMPC70ANHM3/I denotes the preferred packaging option: 13-inch diameter plastic tape and reel with a base quantity of 6500 units. This format supports high-volume automated SMT assembly and is distinct from the "H" suffix (7-inch reel, 1500 units), both sharing identical electrical and qualification specifications.
How does the SMPC (TO-277A) package differ from standard SMA or SMB packages?
The SMPC (TO-277A) package used by SMPC70ANHM3/I features a 3-terminal configuration with dual anodes and a center cathode, enabling symmetrical PCB layout and improved thermal spreading. At 1.1 mm height, it is significantly lower than SMA (2.2 mm) or SMB (2.6 mm), and its JEDEC-compliant outline supports higher surge density per unit area than 2-terminal alternatives.
Can SMPC70ANHM3/I be used in bidirectional transient protection circuits?
No, SMPC70ANHM3/I is strictly unidirectional, as stated in the primary characteristics table and features list. It clamps only positive transients relative to its cathode. For bidirectional protection, a separate device such as SMPC70CA or a back-to-back pair would be required - SMPC70ANHM3/I must be oriented with cathode toward reference potential to function correctly.
SMPC70ANHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- TO-277, 3-PowerDFN
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 13.3A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-277A (SMPC)
SMPC70ANHM3/I FAQ
1.How can I place an order for SMPC70ANHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC70ANHM3/I on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMPC70ANHM3/I reliable?
The price and inventory of SMPC70ANHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC70ANHM3/I is usually 5 days.
3.What payment methods are accepted for SMPC70ANHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC70ANHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC70ANHM3/I?
SMPC70ANHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC70ANHM3/I order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMPC70ANHM3/I?
For technical support, including SMPC70ANHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC70ANHM3/I requirements.
6.How does Aetrix verify that SMPC70ANHM3/I is sourced from the original manufacturer or authorized distributors?
All SMPC70ANHM3/I products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMPC70ANHM3/I meets industry standards.
7.What is the process for return or replacement of SMPC70ANHM3/I?
All SMPC70ANHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMPC70ANHM3/I, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMPC70ANHM3/I part is unused and in its original packaging.
Return procedure for SMPC70ANHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMPC70ANHM3/I Tags
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